The previous night I stuffed my backpack with items I plan to lug across the country between January and June 2018. And though the contents added up to nearly 30 pounds, they mostly resembled what I’d haul on a two night, no-frills camping trip. The basic essentials including a day’s worth of high-calorie snacks and 6 total liters of water. Turns out one liter of water weighs 2.2 lbs—which means nearly half my pack’s total weight is water. Hopefully, once I get on the road, I never go too long without this much water on my person. I can already…